The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
Nov. 20, 1998
Takashi Noji, Tochigi-Ken, JP;
Mitsumasa Hiroi, Yokohama, JP;
Junji Taniguchi, Yokohama, JP;
Yoshinobu Sekijima, Otawara, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
The object of the present invention is to provide a radioactive-ray image tube having less deformations, such as the twist of an input substrate, less aberration over the entire regions of an output image, excellent resolution and good brightness uniformity and contrast characteristics. This radioactive-ray image tube,comprises an input window,formed on one side surface of a vacuum vessel,and allowing radioactive-rays to enter the vacuum vessel,, an input screen,for converting the radioactive-rays incident on the input window,into a fluorescent image or a photoelectric image, and an input substrate,holding the input screen,is characterized in that the input substrate,comprises of a clad material,having an aluminum alloy material,on the radioactive-ray incidence side and a pure aluminum material,on the input screen,side provided integrally with each other.